Unable to backup my site using Snapshot

I am unable to backup my site using Snapshot. I have tried scheduling backups and manually initiating backups. Neither option seems to work. This problem only appeared a few weeks ago when I switched to the Fixer theme. The backup will begin to run each time and then time out. I will paste a screenshot of the error message below. Thanks for your help!

How do you rate me?

Thank you for rating your experience!

We’re thrilled to hear you had a great experience with . Would you like to leave a comment about your experience?
Thanks for voting on your experience with , we’d love to get some feedback please.
Ohh no! We’re really sorry to hear you didn’t have a pleasant experience with , we’re always looking at how we can improve and would appreciate you provide some further feedback here please.
Type your feedback here

it's great that you had a positive one. Based on your experience in this ticket would you please be kind enough to rate us externally on: